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WorksheetsSoil Fertility
Total questions: 32
Worksheet time: 16mins
The ability of soil to supply nutrients fro plant growth refers to:
Soil Nutrients
Soil Salinity
Soil Fertility
Soil Tilth
What is a Plant Nutrient?
Essential elements needed for plant development.
Essential pH levels needed for plant development.
Non-essential elements needed for plant production.
True or False: Plants need all 90 elements for growth and development.
True
False
True or False: Out of the 17, Carbon, Oxygen and Hydrogen account for 55% of the elements a plant need.
True
False
True or False- Active transportation the ions across the cell membrane allows for some elements be take it up more than others.
True
False
True or False- plants that grow under less light will make less sugar and the more nutrients a plant will take to balance that out.
True
False
True or False- Drainage in soil compaction speed up the movement of oxygen therefore increasing the amount of nutrients it is observed.
True
False
True or False- respiration rates go down and cold soil, so the plan is less energy to get nutrients.
True
False
True or False: When we have and excess of Hydrogen ions the solution become acidic, there for rainwater is mildly acidic.
True
False
True or False: Blueberries are the one plant that likes a more alkaline or slightly basic soil. .
True
False
There are 3 rules to determine if an element is essential to plant health, select all 3.
A Lack of the element stops a plant from completing growth or reproduction.
A shortage of the element can be corrected by supplying similar elements.
The element is directly involved in plant nutrition, not merely “taking up space” in plant tissues.
A shortage of the element can be corrected only by supplying that element.
There are 7 essential elements out of 17, choose 3 of the 7 that are listed here.
Carbon
NItrogen
Cobalt
Iron
Potassium
Elements like Nitrogen, Phosphorus and Potassium are needed in larger amounts These are referred to as:
Microminerals
Macronutrients
Trace Minerals
Essential Nutrients.
Sodium is an example of what type of element & what does that mean for the plant?
Beneficial Element- They don't meet the essential requirement for all plants but the aid in growth.
Supplemental Element- They don't meet the requirements for plant growth.
Beneficial Element- They meet the essential requirement for all plants an play a huge role in growth.
Why does clay hold more nutrients than other soils?
Less surface area so more pore space
More surface are exposure to hold nutrients
Stickiness will hold nutrients
Oxide Clays are tiny particles of _____ and ______.
Iron & Cobalt
Iron & Magnesium
Cobalt, Aluminum
Aluminum & Iron
Which statement is true about oxide clays?
Oxide clays swell, they aren’t sticky and don’t hold on to nutrients as well as others.
Oxide clays swell, they are very sticky but don’t hold on to nutrients as well as others.
Oxide clays do not swell, they are sticky and hold on to nutrients better than all the others
Oxide clays do not swell, they aren’t sticky and don’t hold on to nutrients as well as others.
What type of charge to clay colloids hold
Positive
Negative
Neither
What are the three factors that affect soil fertility?
The amount of storage capacity of a soil (Cation exchanges)
How much of that storage contains nutrients
The amount of roots a plant has
How easily roots take up the nutrients
Nutrients must pass ________of the root cells and move to _________ to be delivered to the rest of plant?
Cell Membranes, vascular system
Cell wall, mitochondrion system
Cell Membrane, Mitochondria system
Cell wall, Cell Membrane
Plants exchange what with bases from the soil?
Plants take exchangeable bases from solution and replace them with Hydrogen ions
Plants take exchangeable bases from solution and replace them with Hydroxyl ions
Plants take exchangeable bases from solution and replace them with Supplemental ions
When farmers put fertilizer on their field what are they trying to achieve?
They are reversing the addition of nutrient cations and increasing nutrient value of the soil
They are reversing the loss of nutrient cations and increasing nutrient value of the soil
What is root interception?
Maintaining a balance of nutrients in the soil by displacing volumes of nutrients towards the topsoil.
Extension of the vascular systems as it grows, they absorb a volume of nutrients and those are doesn’t leave any that are readily available at the root surface to be absorbed.
Extension of the root system as it grows, they displace a volume of soil that contains nutrients that are readily available at the roots surface and absorbed
Maintaining a balance of ions in the soil by displacing volumes of nutrients near the bottom of the root system.
Why is fall a preferred time for fertilizing turf and trees?
Cool temps stop shoot growth, warm soils keep roots active to uptake fertilizers.
Warm temps stop shoot growth, warm soils though keep roots active to uptake fertilizers.
Warm temps stop root growth and keep them in place for better fertilizer uptake.
When you have a pH of 7.0 your soil is said to be:
Extremely Acidic
Slightly Sour
Neutral
Extremely Basic
In water the number of __________ ions are equal to the number of ____________ ions to maintain a balance.
Hydrogen & Acidic
Hydroxyl & Basic
Basic & Acidic
Hydrogen & Hydroxyl
What are the two ways that crops will change the pH levels in the soil?
First when roots take up cation nutrients like potassium, they give back hydrogen ions. Second growers take calcium and magnesium with each crop harvested; it will speed up acidification.
First when roots take up cation nutrients like potassium, they give back hydroxyl ions. Second growers take calcium and carbon with each crop harvested; it will speed up acidification.
Which pH ranges to soybeans grow best in?
6.0-8.0
7.0-9.0
6.0-7.0
5.0-6.0
Most plants prefer which pH range for growth?
10.0-14.0
3.0-6.0
7.0
6.0-7.0
True or False: pH alters the solubility of nutrients and there for changes the availability of nutrients in the soil.
True
False
Nitrogen prefers which pH ranges?
7.0-9.0
5.0-9.0
4.0-7.0
Soil organisms thrive in...
Near Acidic pH levels
Basic pH levels
Near- Neutral pH Soils
